Doom9's Forum - View Single Post - GUIDE: How To Properly Encode Dolby Digital Audio (AC3)

Julio · 24th June 2003, 15:47

Hi,

I think I've understood the whole post of SomeJoe, but I've got some more questions with a WAV (of a rock concert) I'm trying to encode to AC3, using Soft Encode :

Before reading this post, I thought it was best to set Dialog Normalization to -31 dB, because when I used lower settings it gave me an AC3 that, when decompressed to WAV, had extremely low dynamics.

So I encoded it with -31 dB dialog normalization, and I got what SomeJoe calls "up and down pumping of the volume" at certain moments in my soundtrack ! Therefore I think my dialog normalization parameter is not right.

Here are the values I got when analyzing my soundtrack with Cool Edit 2000 :

Min RMS Power : -87.2 dB
Max RMS Power : -12.0 dB
Average RMS Power : -22.8 dB
Total RMS Power : -22.4 dB

So, should I set dialog normalization to something like -23 dB ?

24th June 2003, 15:47	#4 \| Link
Julio Registered User Join Date: May 2003 Posts: 4	Hi, I think I've understood the whole post of SomeJoe, but I've got some more questions with a WAV (of a rock concert) I'm trying to encode to AC3, using Soft Encode : Before reading this post, I thought it was best to set Dialog Normalization to -31 dB, because when I used lower settings it gave me an AC3 that, when decompressed to WAV, had extremely low dynamics. So I encoded it with -31 dB dialog normalization, and I got what SomeJoe calls "up and down pumping of the volume" at certain moments in my soundtrack ! Therefore I think my dialog normalization parameter is not right. Here are the values I got when analyzing my soundtrack with Cool Edit 2000 : Min RMS Power : -87.2 dB Max RMS Power : -12.0 dB Average RMS Power : -22.8 dB Total RMS Power : -22.4 dB So, should I set dialog normalization to something like -23 dB ?